DC Test Power Supply

DC Test Power Supply

MOEORW-W5203 DC Test Power Supply is a dedicated independent power supply designed for preventive tests of high-voltage circuit breakers in power systems. It solves the defects of traditional test power supply schemes:

√ Avoids risks such as protection failure or collapse of the on-site DC system caused by short circuit or direct grounding of test wiring when using the on-site control cabinet DC system.

√ Eliminates the disadvantages of heavy weight, large output ripple and non-isolated input/output in the traditional voltage regulator + silicon rectifier scheme.

This power supply features full input-output isolation, stable DC output, low ripple, over-current and over-voltage protection. It is compact, easy to wire and operate, providing a safe and independent power source for high-voltage switch closing and opening tests without affecting the on-site DC system.

1. Input-output Electrical Isolation

1. Adopts complete electrical isolation design between input and output.

2. Eliminates the risk of shell electrification, ensuring personal and equipment safety.

2. Stable and Adjustable Output

1. Provides 0~250V continuously adjustable DC voltage and 0-50A current output.

2. Voltage stability and ripple coefficient are both less than 3%, ensuring reliable test data.

3. Complete Protection Mechanism

1. Built-in over-current and over-voltage protection functions.

2. Prevents equipment damage caused by abnormal test conditions.

4. User-friendly Operation

1. Compact and lightweight structure, convenient for on-site transportation and deployment.

2. Simple wiring and operation, with clear voltage adjustment and test control buttons.

5. Safe Test Guarantee

1. Provides an independent test power supply, avoiding interference with the on-site operation DC system.

2. Effectively reduces potential risks in high-voltage switch tests.

1. Disconnect the control power supply in the control box of the tested switch (usually remove the fuse connecting the control power supply and the control bus).

2. Turn on the power switch and adjust the voltage knob to the required voltage.

3. Press the "Close" and "Open" buttons to perform closing and opening tests.

4. After the test, adjust the voltage knob to the minimum and turn off the power.

5. Wait for a few seconds until the voltmeter returns to zero, then remove the test leads.

• Only qualified operators are allowed to operate the instrument.
• Do not use the instrument in humid, explosive gas, water vapor or dusty environments.
• Reliably ground the host through the grounding terminal before testing to avoid static induction.
• Do not frequently switch the power supply during the test to prevent equipment damage or accuracy reduction.
• Immediately cut off the power supply in case of abnormal conditions during operation.
• Do not use the instrument with the cover or shell open; keep vents unobstructed for heat dissipation.
• Use only specified replacement fuses and power cords matching local voltage and sockets.
• Do not touch bare contacts or use test leads with damaged insulation.
• Do not place the instrument in the open air to avoid rain erosion.
• Contact the manufacturer for maintenance in case of abnormality; do not disassemble or repair by yourself.

It is suitable for on-site closing and opening tests, factory tests, and preventive tests of high-voltage circuit breakers and high-voltage switches in power systems, providing an independent DC power supply for switch operation tests.